WHY CHOOSE YOJO&quest;1&period;All our products have the CE&comma; UL&comma; ISO9001&comma; ROHS&comma; DNV&comma; BV&comma; CCS&comma; NK certificate approved&period;2&period; All our stainless steel material are purchased from Chinese biggest supplier&comma; China Bao Steel&semi; All titanium material are imported from Japanese Nippon Steel&period; We only select the best raw material to our customers&period;3&period; We have the professional test machine&comma; every product must pass the water pressure test and gas pressure test&comma; and then we will package them&period; Otherwise they will be remanufacturing&period;4&period; We use first-class wooden case to protect our products&period;